body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.container {
    width: 60%;
    height: 60%;
}


.row {
    width: 100%;
    margin: 0 auto;
}

.input-group-addon {
    line-height: 40px;
    text-align: center;
}

.login-header {
    height: 30%;
    line-height: 30%;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}